> HTTP Range Requests solve this without any clever logic, if mutually supported. Understated comment in the thread. The very first search hit on Google is no

> HTTP Range Requests solve this without any clever logic, if mutually supported. Understated comment in the thread. The very first search hit on Google is none other than Mozilla's page on ranged requests. https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Range_requests https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Ran... Here's the leading summary from that page. > An HTTP Range request asks the server to send parts of a resource back to a client. Range requests are useful for various clients, including media players that support random access, data tools that require only part of a large file, and download managers that let users pause and resume a download. Here's a RFC: https://datatracker.ietf.org/doc/html/rfc7233 https://datatracker.ietf.org/doc/html/rfc7233